I use .htaccess to prevent some of the image grabbing programs too. I got this code from a fellow adult webmaster named Fuckin Bill so all credit should go to him. Please note that it doesn't exclude Google and that is on purpose. You can just copy and paste this into your .htaccess file.
Code:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} ^.*\[Ww\]eb\[Bb\]andit.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Ants.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*attach.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Backweb.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Bandit.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*BlackWidow.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Bot\ mailto:craftbot@yahoo.com.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Buddy.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*CherryPicker.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*ChinaClaw.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Collector.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Copier.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Crawler.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Crescent.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*DA\ 4.0.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*DA\ 5.0.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*DA\ 5.3.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*DIIbot.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*DISCo.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Download\ Demon.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Download\ Ninja.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Downloader.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Drip.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*eCatch.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*EirGrabber.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*EmailCollector.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*EmailSiphon.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*EmailWolf.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Express\ WebPictures.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*ExtractorPro.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*EyeNetIE.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*FileHound.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*FlashGet.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*GetLeft\ 1.0.5.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*GetLeft\ 1.3.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*GetRight.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Gets.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Go!Zilla.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Go-Ahead-Got-It.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*gotit.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Grabber.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*GrabNet.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Grafula.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*HMView.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*HTTrack.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*ia_archiver.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*IBrowse.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Image\ Stripper.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Image\ Sucker.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*InterGET.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Internet\ Ninja.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Internet\ Ninja.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Internet\ Ninja\ 4.0* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Internet\ Ninja\ 5.0* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Internet\ Ninja\ 6.0* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*JetCar.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*JOC.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*JOC\ Web\ Spider.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*JustView.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*larbin.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*leech.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*LeechFTP.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*lftp.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*likse.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Lickity.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*LinkWalker.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Link\ Sleuth.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Magnet.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Mag-Net.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Mass\ Downloader.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Memo.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Microsoft.URL.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*MIDown\ tool.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Mirror.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Mister\ PiX.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Mozilla.*NEWT.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Navroad.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*NearSite.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Net\ Vampire.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*NetAnts.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*NetCaptor\ 6.0P* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*NetSpider.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*NetZIP.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*NICErsPRO.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Octopus.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Offline.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*PageGrabber.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Papa\ Foto.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*pcBrowser.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*PicaLoader* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Pockey.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*psbot.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Pump.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*RealDownload.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Reaper.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Recorder.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*ReGet.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Siphon.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*sitecheck.internetseer.com.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*SiteSnagger.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Slurp.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*SmartDownload.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Snagger.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Snake.*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*SpaceBison.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Stripper.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Sucker.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*SuperBot.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*SuperHTTP.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Surfbot.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*tAkeOut.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Teleport.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Teleport\ Pro.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*IUPUI.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Vacuum.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*VoidEYE.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Web\ Image\ Collector.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Web\ Sucker.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebAuto.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebEMailExtrac.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebFetch.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebReaper.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebSauger.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Website\ eXtractor.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Webster.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebStripper.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebWhacker.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*WebZIP.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Whacker.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Widow.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Xaldon\ WebSpider.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Zeus.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^.*Zeus.*Webster.*
RewriteRule ^.*$ http://www.google.com [L,R]
-A